Recovery of hydrocarbons, bituminous materials and the like
Recovery of mercury control reagents by tribo-electric...
Recovery of metal values from oil sands tailings slurry
Recovery of oil from bituminous sand
Recovery of oil from bituminous sands
Recovery of oil from bituminous sands
Recovery of oil from bituminous sands
Recovery of oil from bituminous sands
Recovery of oil from shale and the like
Recovery of oil from tar sand
Recovery of oil from tar sands
Recovery of oil from tar sands
Recovery of petalite from ores containing feldspar minerals
Recovery of petroleum from oil-bearing sands
Recovery of petroleum from tar sands
Recovery of platinum-group metals and other metal valuables
Recovery of salvageable components from waste material
Recovery of soluble products from coaly substances
Recovery of suspended materials from gases
Recovery of tar from tar sands